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參數(shù)資料
| 型號(hào)： | MAX5236 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single-Supply 3V/5V, Voltage-Output, Dual, Precision 10-Bit DACs |
| 中文描述： | 單電源、3V/5V、電壓輸出、雙路、高精度10位DAC |
| 文件頁(yè)數(shù)： | 13/19頁(yè) |
| 文件大?。?/td> | 553K |
| 代理商： | MAX5236 |
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Unipolar Output
Figure 7 shows the MAX5236/MAX5237 configured for
unipolar, rail-to-rail operation with a gain of 1.6384V/V.
The MAX5237 produces a 0 to 4.092V output with 2.5V
reference, while the MAX5236 produces a range of 0 to
2.046V output with a 1.25V reference. Table 4 lists the
unipolar output codes.
Bipolar Output
The MAX5236/MAX5237 can be configured for a bipo-
lar output, as shown in Figure 8. The output voltage is
given by the equation:
V
OUT
= V
REF
[((1.6348 x NB) / 1024) - 1]
where NB represents the numeric value of the DAC
’
s
binary input code. Table 5 shows digital codes and the
corresponding output voltage for Figure 8
’
s circuit.
Using an AC Reference
In applications where the reference has an AC signal
component, the MAX5236/MAX5237 have multiplying
capabilities within the reference input voltage range
specifications. Figure 9 shows a technique for applying
a sinusoidal input to REF_, where the AC signal is offset
before being applied to the reference input.
Digital Calibration and
Threshold Selection
Figure 10 shows the MAX5236/MAX5237 in a digital
calibration application. With a bright light value applied
to the photodiode (on), the DAC is digitally ramped until
it trips the comparator. The microprocessor (μP) stores
this
“
high
”
calibration value. Repeat the process with a
dim light (off) to obtain the dark current calibration. The
μP then programs the DAC to set an output voltage at
M
Single-Supply 3V/5V, Voltage-Output, Dual,
Precision 10-Bit DACs
______________________________________________________________________________________
13
16-BIT SERIAL WORD
C2
C1
C0
D9..............D0
S2, S1,
S0*
000
000
FUNCTION
0
0
0
1
1
0
10-bit DAC data
10-bit DAC data
Load input register A; DAC registers are unchanged.
Load input register A; all DAC registers are updated.
0
1
1
10-bit DAC data
000
Load all DAC registers from the shift register (start up both DACs
with new data, and load the input registers).
1
0
0
X X X X X X X X X X
000
Update both DAC registers from their respective input registers
(start up both DACs with data previously stored in the input
registers).
1
1
0
1
1
0
10-bit DAC data
10-bit DAC data
000
000
Load input register B; DAC registers are unchanged.
Load input register B; all DAC registers are updated.
1
1
1
P1A P1B X X X X X X X X
000
Power down both DACs respectively according to bits P1A and
P1B (see Table 3). Internal bias remains active.
0
0
0
0 0 1 X X X X X X X
000
Update DAC register A from input register A (start up DAC A with
data previously stored in input register A).
0
0
0
0 1 1 P1A P1B X X X X X
000
Full power-down. Power down the main bias generator and
power down both DACs respectively according to bits P1A and
P1B (see Table 3).
0
0
0
1 0 1 X X X X X X X
000
Update DAC register B from input register B (start up DAC B with
data previously stored in input register B).
0
0
0
0
0
0
1 1 0 P1A X X X X X X
1 1 1 P1B X X X X X X
000
000
Power down DAC A according to bit P1A (see Table 3).
Power down DAC B according to bit P1B (see Table 3).
Table 2. Serial Interface Programming Commands
P1(A/B)
0
1
SHUTDOWN MODE
Shut down with internal 1k
load to GND
Shut down with internal 200k
load to GND
Table 3. P1 Shutdown Modes
X = Don’t care.
*
= S2, S1, and S0 must be zero for proper operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5236EUB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5236EUB+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5236EUB+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5236EUB-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5237EUB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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